condition mean min max ZT0-3 14.63051991775 11.0426135955 18.21842624 ZT4-7 5.53041380375 4.8518689985000005 6.208958609 ZT8-11 8.554547385 6.913850203499999 10.1952445665 ZT12-15 9.2537723665 8.656113388 9.851431345 ZT16-19 8.343322356 8.323971349499999 8.3626733625 ZT20-23 10.11577719375 9.724233487500001 10.5073209